Padlock



Aug. 13, 1935. y Q R FRAlM 2,011,515 1 PADLOGR Filed sepi. 26, 1954 Patented Aug. 13, 1935 'PATENT OFFICE i PADLOCK Samuel RoFraim, Lancaster, Pa.

Appli'oation soptemer 26, 1934, serial No. 745,626

My invention relates to certain improvements in padlocks of the type having a slidingshackle engaged by a locking spring located in a housing, .the spring being operated by a` key-controlled .1.18 tumbler mechanism.- I

One object of my invention is to so design a lock of the type above mentioned that it can be manufactured at a reasonable price withoutimpairing its eiciency. Y t

u A further object of the inventionris to so design the spring housing and the tumbler insert that theyvcan be readily assembled and inserted in the lock casing between the posts of the lock.

A still further object is to provide a bridge in u whichthe disc tumbler plug ismountedso as to allow the plug to freely turn, the bridge holding the plug in position in the casing in respect to the 'spring housing.

The invention also relates to certain details of gq construction which will be described hereinafter.

`Inthe accompanying draWi-ng'i t Fig. 1 is an interior view of my improved padlock, the front plate of the casing being removed;` l f y Fig. 2 is a sectional elevation on the line 2 2 yof Fig. 3;

. Fig. 3 is a transverse section on -the line 3 3,

Fig'. 1;

' Fig. 4 is a sectional plan viewv through the .30 casinlg yand the spring housing on the line 4 4,

Fig.

y Fig. 5 is a sectional plan View on the line `5 5 Fgul I Fig. 6 is a detached perspective view vof the 35 `back plate of the casing showing the posts attached; y l A Fig.V` '7 is a detached perspective.A view of the front plate of` the casing; d f

Fig. 8 is a detachedr perspective viewvof the .40 shackle:

" Figs. 9 and 10 are perspective views of the locking springvhous'ing; l .y

Fig. 11 is a detached perspective view Aof the locking spring; Y l

Fig. 12 is a detached perspective view of the bridgepiece in which the disctumbler plugis mounted; Fig. 13 is a detached perspective View `of the `disc tumbler plug; y 50 Fig. 14 is a detached View spring: Fig. 15 is a detached View of the plate for centering the ejecting springy on the bottom of the casing; l l n y ...Il 'f Fig. ,l6'1is' .'a-viewfsimilar to Figure 1 showing a of 'the eiecti'ng pin tumbler assembly in place of a disc tumbler plug and also means for holding the pin tumbler assembly in position; v u

Fig. 1'7k is a detached perspective view of the pin tumbler assembly shown in Fig. 16;

Fig. 18 is a perspective View of the retaining (als plate for the pin tumbler assembly; and. Y t Figs. 19 and 20 are Views illustrating modication of the pin tumbler assembly.

vReferring to the drawing-I is the casing of fgthe lock made in two sections as shown in Figs. 6 and 7 2 is the flanged bottom plate from which extend the posts A3 3a, and 4 is the flanged top plate having holes therein to receive the posts,

the ends of which are riveted over the top piace .J

after the mechanism of the lock has been assembled on the bottom plate and the top plate is placed in position. 'The anges rof both the top d and bottom plates are notched to receive the rtumbler plug and the shackle. y

The shackle 5 is of the ordinary sliding and vswinging type and has a long leg 6 and a short leg l. Therlong leg in the present instance is notched at 8 8 on" both sides to receive the' two arms 9 9 of the locking spring I0 shown in Fig. ll1. This locking spring I0 isklocatedjin a spring housing I'I, shown inl Figs. 9 and 10 .when the arms of the spring engage the shackle,

it'is locked in the closed position. When a key is inserted in the cylinder plug of 'a locking'assembly and turned, the projection I9 of the plug 20 that extends into the housing I I and between the arms 9 9 of the locking spring I0 willspreald the spring arms apart and release the shackle which will'b'e projected by the ejecting spring I2 w35 f which is l-ocated between 'the endof the longnleg of the she-ome and bottom of the easing ofyg.

l. In the present instance', the spring isl heldin position on the bottom of the casing byva notched 'plate I3, Fig. 15. On thelongrleg of the shackle llower plate I6 is slotted at I8 for the rectangular projection I9 on the inner end of the .tumblrjplg 20. fThe side wallswof the 'slot I8 incline' .from each ea ,towards `the centered that the siot narrow at the center and enlarged at each end,

proper key is inserted in the plug slide thediscsy releasethe' plugfrom the bridge piece 23.l

The l"bridge pieceis U-shaped in form having a at top member 24 and slotted side members 25-25, the slots 26 in the side members allowing- 'l the disc tumblers to be moved therein to lock the plug 20 to the bridge piece and as the bridge piece ts between the front and back plates ofthe,

housing, it is held rigidly in position.

'Ihe plug 23 has a flange 21 atits .outer end" which bears against the inner Wall of the casingv and this viiange has a reduced projection 28 which extends throughv the hole in the` bottom 'of the casing. The bridge piece is tted between the in- ,ner-surface of the flange 21 on'the plug 'and the "'s'p'rin'g housing asvshown Vin Figs; 1, 2 and 3 and as thehousing' rests against the twoupper yposts and 'Ii't'sbetween'the sidewalls of the casing, both the V,springhusin'g andthe bridge piecewith'the plug are held iirnily in position. The bridge piece also -f1ts between' the two lower posts 3ft- 3a. v'I'h'e ,Side4` Walls ofthe bridge piece 23 areshaped to vconformfto the plug as shown in Fig. 12. v It will be noticed in referring to Fig. 5 that the angles lf'orrfr'ied on the edges 29l of the slots, 26 hug the `plug2ll very closely and, as the inner sides of the edges 'are sharp, lthey preclude any possibility of .the vi'i'laifers or discs kcarried `by the plug being `fo`rced` pastthese edges by a key whose bittings lido nt correspond to the respective discs or wafers -rwhich areV designed' specifically to the depth 'of key hitting. This prevents the'opening of the lock ,byy akeyfwho'se bittings are not in conformity to x,theactual arrangement of the individual wafers. Ihave not illustrated the tumblers in detail jas th'ey are of the standard type. Y L v '.Thelocking spring IU has a loop '9a in the presf'ent instanceat'one end'from' which extends the two arx'risff-ll/Fig.A 11; The\springs`are 1spaced apartv by the projection 'I9 fon the plug 20 'and lare.,bentgtowards veach other at their ends to in- ;fsu're their engagement with the notched portions ,f8-i8 ofv the shackle.. When the plug is turned by a Y' keythe. projection I9 spreads the arms`9`l9 'of the lspringapart and releases the shackle allowing it -'to b'projected by the ejecting spring The arms are held apart b-y the shackle until it isclosed "when the arms of the spring snapinto the notches, 'locking the shackle to the casing. The looped end laff Vthespring is held between bottom plate of jfthecafing and a .curved tongue 34 and a; short tongue 35 Yprojecting'ofrom the housingll, see

` 'In'FiSf 16,11V Yand 18, .a modicationis shown inwhich pin tumblers are used in place of disc tux'nblers. In this instance, cylinder 23a issubsti- `tuted for the bridge piece. This cylinder has `a "sidefextension 30 for. the sliding pins, not shown Vas this'cylinder is of standard type. In orderito ,prevent the cylinderk turning in thet casing, an

angle-shaped plate 3| is inserted at` the corner fof thelock casing and fits between a, post 3b 1 and theside of the casing and between the spring housing and the bottom of 'the'.casing, and a notch '31 'isior'medin the turned up portion of 7the In Fig. 19 is shown a modification of the cylinder. In this instance the side extension 30h is the full width of the cylinder 23h and fits between the top plate and bottom plate of the casing.

In Fig. 20 the side extension 30o of the cylinder 23o has lugs 33 at each side which extend to the I plates of the casing. In both of these modifications, the angle plate is dispensed With as the cylinder is held from turning by 'the plates of the casing# 1 f While tI have'described th'e'lockingspring as be-` ing U-shaped and having two arms, it will be understood that I do not wishrto limit myself to the ,form of locking spring'nor do I wish toA limit the 'exact method of securing or holding rthe locking spring in the, housing, Aasany form of Alocking spring may be used which will t the housing and which 'can be held by any' suitable means so long as the spring can be operatedby the projection` on the plug to release the shackle fromvengagement by thespring.y i` j v By the construction described above, the mech'- `anisnis oi'. the lock can b e readily assembled, after which they can be-mounted@ the 'bottom plate of the casing and the top plate secured in position.

` I claim:

' 1; The combination'iin a padlock of a two-part casing; upper and "lower nposts connecting the two parts of the casing; a shack-lemounted'in the casing; a locking'yspring housing extending from side to side of the'casing and resting against v the upper posts, said housing having holes forl the `passageof the-'shackle and having aslot in its `lower-plate; aflocking'spring in the housing' en- 'having a reduced portion extending through the b ottom of the casing, Ysaid key plug having aprojection extending through the yspring housing and engaging the locking spring. 1

2. The combination in a. padlock of a two-part casing; upper and lower posts connecting the two parts of the casing;y Yashackle' mountedin `the `casing; a locking spring housing extending from side to side of the'casing and resting againstthe upper posts, `said housing having Yholes for the passage of' the shackleand having a slotin its lower plate; a locking spring in the housing engagingthe shackle; a' locking assembly including a keyplug located in the casing between the housing and the bottom of thecasing and between-the lower posts, a flange on the key plug forming part of the locking assembly having a reduced portion extending through YtheK bottom of the casing,- said plug having a projectionfextending through Ythe 'spring housing and engagingthe locking` spring;

a bridge piece enclosing the key plug and forming'part of `the locking assembly and extending between the flange of the key plug and the underside of the housing,` thefside walls ofI the bridge piece having Aopenings therein for discs of v the plug, the bridge piece'acting as a' shell for ,the Ykey plug and alsoiacting to hold the'several parts together.

Thecombination'iria padlock of ay casing, a notched shackle therein, a transverse Alocking 'springv housing having holes'forxthe passage of if() the notched portion of the shackle, a U-shaped 'lockingfspring'r mounted'inthe housing, the arms 'of the spring extending to the shackle and arranged to engage the notched portion' 'lof the shackle the lower `plai'f'efof the housingehavin'g a slot therein; a cylinder plug having a key-way at one end and an elongated projection at the opposite end, said projection extending through the slot in the housing and between the arms of the locking spring, the plug having a ange `bearing against the bottom of the casing and having la, portion extending through the bottom; and a bridge piece enclosing the plug and located between the flange of the plug and the spring'housing said bridge piece acting to hold the parts together.

4. The combination in a padlock of a casing; a notched shackle located in the casing, a transverse locking spring housing having upper and lower plates and a connecting member, said housing having holes for the passage of the notched portion of the shackle, and a slot for the passage of an operating extension of a plug, a locking spring having arms and located in the housing; a ilanged cylinder plug having a keyway at one end and a projection at the other end, the projection extending through the slot in the spring housing and between the arms of the locking spring; the housing having a curved tongue engaging the loop of the locking spring and means between the flange of the plug and the spring housing for holding the parts in the casing and forming a bearing for the plug.

5. The combination in a padlock, of a casing, a shackle, said shackle having along leg and a short leg, this shackle having a notch arranged to be engaged by a locking spring, a transverse spring housing, a locking spring therein, a locking assembly mounted in the casing between the transverse housing and the bottom of the casing, an ejecting spring between the bottom of the casing and the end of the long arm of the shackle, and a notched plate mounted in the bottom of the casing between the side of the casing and the locking assembly and encircling the ejected spring to hold said spring in position.

6. The combination in a padlock, of a casing, a shackle therein having a long and short arm, an ejecting spring for the shackle, the long leg of the shackle having a notch therein, a transverse locking spring housing, a U-shaped locking spring mounted'in the housing and having an enlarged circular end, the housing having a segmental tongue partly encircling the end of the spring and having a. short tongue to hold the spring in proper engagement in the casing, a cylinder plug mounted in a casing between the housing and the bottom of the casing, said plug having a `key-way at one end and a projection at the opposite end extending into the housing and engaging the arms of the locking spring so that on turning the plug by a key, the arms will be spread apart to release the shackle from the spring, the ejecting spring ejecting the shackle so that the short arm of the shackle will clear the housing. f

7. 'Ihe combination of a casing, a shackle mounted in the casing, a transverse spring housing located in the casing, a locking spring mounted in the housing and arranged to engage the shackle, a cylinder plug mounted between the locking spring housing and the bottom of the casing and having a key-way therein, the said plug having a projection extending into the housing and engaging the locking spring; a cylinder surrounding the plug and having a lateral extension; and a. plate, having a long arm held against the side of the casing and a short arm bent at an angle with respect to the long arm and having a notch therein into which the projection of the cylinder extends. 8. The combination in a padlock, of a casing; a shackle; a housing; locking mechanism within the housing; a key operated cylinder plug for actuating the locking mechanism; sliding discs in the plug arranged to be engaged by a key inserted in the plug; a bridge piece enclosing the plug and having side openings therein to allow movement of the discs; one edge of each opening fitting the plug closely to prevent the turning of the plug until the discs are entirely withdrawn by the insertion of a key having the proper bittings.

9. The combination in a padlock orl a two-part casing; a shackle; upper posts connecting the two-parts of the casing; a transversely arranged locking spring housing resting against said posts, a locking spring located in the housing; said housing having holes for the passage of one leg of the shackle which is engaged by the locking spring; a locking assembly fitting between the I `bottom of the casing and the spring housing and holding the spring housing against the posts; the locking assembly having a key plug provided with'a projection extending into the housing and engaging the locking spring, so that when av key is inserted in the key plug and the plug turned, the arms of the locking spring will be spread apart releasing the shackle.

10The combination of a casing; a notchedv shackle; a locking spring housing extending from one side of the casing to the other side, means on the casing against which the housing rests; a locking spring located in the housing and arranged to engage the shackle; the lower plate of 

